diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h
index 28ce70f..dfdda17 100644
--- a/fs/ext4/ext4_extents.h
+++ b/fs/ext4/ext4_extents.h
@@ -278,7 +278,7 @@
 }
 
 extern int ext4_ext_calc_metadata_amount(struct inode *inode,
-					 sector_t lblocks);
+					 ext4_lblk_t lblocks);
 extern int ext4_extent_tree_init(handle_t *, struct inode *);
 extern int ext4_ext_calc_credits_for_single_extent(struct inode *inode,
 						   int num,